So my boyfriend and I have been having sex a lot the past 8 days (multiple times even) and about 4 days ago I felt a lot of cramping followed by nausea the next day and has been constant ever since. Also my boobs are tender and feel 'tingly' as well as being very hungry a lot and pee very frequently. Could I possibly be pregnant and be feeling things already? Read that some women just feel immediate changes as little as days to a week after conception. Thanks!